/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
/****************************************************************************
 * drivers/serial/lowconsole.c
 *
 *   Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <tinyara/config.h>

#include <sys/types.h>
#include <errno.h>
#include <debug.h>

#include <tinyara/arch.h>
#include <tinyara/fs/fs.h>

/****************************************************************************
 * Definitions
 ****************************************************************************/

/* The architecture must provide up_putc for this driver */

#ifndef CONFIG_ARCH_LOWPUTC
#error "Architecture must provide up_putc() for this driver"
#endif

/****************************************************************************
 * Private Function Prototypes
 ****************************************************************************/

static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen);
static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen);
static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg);

/****************************************************************************
 * Private Variables
 ****************************************************************************/

static const struct file_operations g_consoleops = {
	0,							/* open */
	0,							/* close */
	lowconsole_read,			/* read */
	lowconsole_write,			/* write */
	0,							/* seek */
	lowconsole_ioctl			/* ioctl */
#ifndef CONFIG_DISABLE_POLL
	, 0						/* poll */
#endif
};

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Name: lowconsole_ioctl
 ****************************************************************************/

static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg)
{
	return -ENOTTY;
}

/****************************************************************************
 * Name: lowconsole_read
 ****************************************************************************/

static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen)
{
	return 0;
}

/****************************************************************************
 * Name: lowconsole_write
 ****************************************************************************/

static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen)
{
	ssize_t ret = buflen;

	for (; buflen; buflen--) {
		up_putc(*buffer++);
	}

	return ret;
}

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: lowconsole_init
****************************************************************************/

void lowconsole_init(void)
{
	(void)register_driver("/dev/console", &g_consoleops, 0666, NULL);
}
